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FX2 logic analyser

http://www.sigrok.org provides opensource firmware “fx2lafw” to use cheap FX2-based logic analysers cross-platform. This projects aims at extending the functionality of this firmware and to make a small hardware modification to allow for basic triggering. The final goal is to provide the lab with a working logic analyser setup.

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Log

July 2014

Got 8051 cross-compiler installed. Increased sampling speed to 48 MHz. This can be achieved by a recursive GPIF DP point that re-executes the data transfer.

05/08/2014

Soldered to wires to connect RDY0 and RDY1 to D0 and D1. This allows to add trigger decision points. A proof-of-concept firmware with a 4-stage trigger seems to work. The maximum number of delay states was reduced to 255 to fit within a single state. This should be enough anyways (further downsampling can be done on the PC side…).
(see the two black wires added to the FX2)